Question

我正在修改现有的SQL查询。问题是我想从表中添加描述到现有数据。我添加了一个子查询，如图所示，但它似乎改变了我的返回数据集。 anyonple请建议如何使用子查询获取正确的数据？

SELECT TOP 100
        ROW_NUMBER() OVER ( ORDER BY LTRIM(VW_POLINDEX.SYMBOL) ASC, LTRIM(VW_POLINDEX.POLNUM) ASC, LTRIM(VW_POLINDEX.MODULE) ASC ) AS RowNum
       ,VW_POLINDEX.POLNUM
       ,VW_POLINDEX.SYMBOL
       ,VW_POLINDEX.MODULE
       ,
        --Subquery: 1 This subquery will fetch the description based on the pol details 
        ( SELECT TOP 1
                    reasonamendedCd
          FROM      SHPolicyAmendmentHistory SH
          WHERE     SH.PolicyNbr = VW_POLINDEX.POLNUM
                    AND SH.PolicySymbolCd = VW_POLINDEX.SYMBOL
                    AND SH.PolicyModuleNbr = Module
          ORDER BY  amendmentnbr DESC
        ) AS POLSECRIPTION
       ,VW_POLINDEX.CANCELLD
FROM    VW_POLINDEX WITH ( NOLOCK )
        INNER JOIN LINE_OF_BUS_LIT WITH ( NOLOCK ) ON VW_POLINDEX.LOB = LINE_OF_BUS_LIT.LOB_CD
        INNER JOIN POL_STATUS_LIT WITH ( NOLOCK ) ON VW_POLINDEX.TYPEACT = POL_STATUS_LIT.POL_STATUS_CD
WHERE   ( CASE VW_POLINDEX.MODULE
            WHEN 0 THEN VW_POLINDEX.SYMBOL + '0'
            ELSE VW_POLINDEX.SYMBOL + '1'
          END ) NOT IN ( 'RJD1', 'RJH1' )
        AND VW_POLINDEX.LOB = 'HP'

当前输出：

+------+-------+------+------+-------------+---------+
|RowNum|POLNUM |SYMBOL|MODULE|POLSECRIPTION|CANCELLD |
+------+-------+------+------+-------------+---------+
|3     |0040026|CCS   |2     |<NULL>       |9/12/2006|
+------+-------+------+------+-------------+---------+ 
|4     |0040026|CCS   |3     |<NULL>       |9/12/2010|
+------+-------+------+------+-------------+---------+
|2     |0040026|CCS   |1     |<NULL>       |9/12/2006|
+------+-------+------+------+-------------+---------+ 
|7     |2000010|CCS   |2     |XM           |1/1/1753 |
+------+-------+------+------+-------------+---------+
|8     |2000010|CCS   |3     |CPP          |1/1/1753 |
+------+-------+------+------+-------------+---------+
|12    |2000025|CCS   |0     |RN           |1/1/1753 |
+------+-------+------+------+-------------+---------+
|16    |2000025|CCS   |4     |RN           |1/1/1753 |
+------+-------+------+------+-------------+---------+
|6     |2000010|CCS   |1     |IC           |1/1/1753 |
+------+-------+------+------+-------------+---------+
|20    |2000029|CCS   |1     |RN           |1/1/1753 |
+------+-------+------+------+-------------+---------+
|10    |2000010|CCS   |5     |CM           |1/1/1753 |
+------+-------+------+------+-------------+---------+
|11    |2000010|CCS   |6     |Z            |7/28/2013|
+------+-------+------+------+-------------+---------+
|24    |2000029|CCS   |5     |RN           |1/1/1753 |
+------+-------+------+------+-------------+---------+
|14    |2000025|CCS   |2     |RN           |1/1/1753 |
+------+-------+------+------+-------------+---------+

预期输出 （在prev输出中缺少某些行，并且在添加子查询后也没有排序）：

+------+-------+------+------+-------------+---------+
|RowNum|POLNUM |SYMBOL|MODULE|POLSECRIPTION|CANCELLD |
+------+-------+------+------+-------------+---------+
|1     |0040026|CCS   |0     |test         |9/12/2006|
+------+-------+------+------+-------------+---------+
|2     |0040026|CCS   |1     |test         |9/12/2006|
+------+-------+------+------+-------------+---------+
|3     |0040026|CCS   |2     |test         |9/12/2006|
+------+-------+------+------+-------------+---------+
|4     |0040026|CCS   |3     |test         |9/12/2010|
+------+-------+------+------+-------------+---------+
|5     |2000010|CCS   |0     |test         |1/1/1753 |
+------+-------+------+------+-------------+---------+
|6     |2000010|CCS   |1     |test         |1/1/1753 |
+------+-------+------+------+-------------+---------+
|7     |2000010|CCS   |2     |test         |1/1/1753 |
+------+-------+------+------+-------------+---------+
|8     |2000010|CCS   |3     |test         |1/1/1753 |
+------+-------+------+------+-------------+---------+
|9     |2000010|CCS   |4     |test         |1/1/1753 |
+------+-------+------+------+-------------+---------+
|10    |2000010|CCS   |5     |test         |1/1/1753 |
+------+-------+------+------+-------------+---------+
|11    |2000010|CCS   |6     |test         |7/28/2013|
+------+-------+------+------+-------------+---------+
|12    |2000025|CCS   |0     |test         |1/1/1753 |
+------+-------+------+------+-------------+---------+
|13    |2000025|CCS   |1     |test         |1/1/1753 |
+------+-------+------+------+-------------+---------+
|14    |2000025|CCS   |2     |test         |1/1/1753 |
+------+-------+------+------+-------------+---------+
|15    |2000025|CCS   |3     |test         |1/1/1753 |
+------+-------+------+------+-------------+---------+
|16    |2000025|CCS   |4     |test         |1/1/1753 |
+------+-------+------+------+-------------+---------+

Answer 1

为什么不在INNER JOIN中使用该描述表？ LIKE

SELECT TOP 100
        ROW_NUMBER() OVER ( ORDER BY LTRIM(VW_POLINDEX.SYMBOL) ASC, LTRIM(VW_POLINDEX.POLNUM) ASC, LTRIM(VW_POLINDEX.MODULE) ASC ) AS RowNum
       ,VW_POLINDEX.POLNUM
       ,VW_POLINDEX.SYMBOL
       ,VW_POLINDEX.MODULE
       ,VW_POLINDEX.CANCELLD
       ,SH.reasonamendedCd
FROM    VW_POLINDEX WITH ( NOLOCK )
        INNER JOIN LINE_OF_BUS_LIT WITH ( NOLOCK ) ON VW_POLINDEX.LOB = LINE_OF_BUS_LIT.LOB_CD
        INNER JOIN POL_STATUS_LIT WITH ( NOLOCK ) ON VW_POLINDEX.TYPEACT = POL_STATUS_LIT.POL_STATUS_CD
        INNER JOIN SHPolicyAmendmentHistory SH ON SH.PolicyNbr = VW_POLINDEX.POLNUM
                                                  AND SH.PolicySymbolCd = VW_POLINDEX.SYMBOL
                                                  AND SH.PolicyModuleNbr = Module
WHERE   ( CASE VW_POLINDEX.MODULE
            WHEN 0 THEN VW_POLINDEX.SYMBOL + '0'
            ELSE VW_POLINDEX.SYMBOL + '1'
          END ) NOT IN ( 'RJD1', 'RJH1' )
        AND VW_POLINDEX.LOB = 'HP'

连接中的SQL子查询

1 个答案: